如何在Javascript数组中查找单词（字符串）？

Question

I need to check if my array has the word

This is my code please help

  var name = ['heine', 'hans']; var password = ['12343', '1234']; function login() { var pos; if(name.includes('hans')) { console.log("enthält"); pos = name.indexOf('hans'); console.log(pos) if(password[pos] === '1234') { console.log("angemeldet") } } } 

consoleout = 6, but why, it must be a 1

If the word hans is in the array, than i need the position from the word in the array

Answer 1

You might find some() handy for this. It will pass the index into the callback which you can use to find the corresponding value from the passwords array:

 function test(name, pw) { let names = ["heine", "hans"]; let passwords = ["12343", "1234"]; // is there `some` name/pw combinations that matches? return names.some((n, index) => name == n && pw == passwords[index]) } console.log(test("hans", '1234')) // true console.log(test("hans", '12345')) // false console.log(test("hans", '12343')) // false console.log(test("heine", '12343')) // true console.log(test("mark", '12343')) // false 

Answer 2

You may use this. I am not sure if it is what you want.

let names = ["heine", "hans"];
let password = ["12343", "1234"];
let i, temp;

function log(login, pass) {
    if((i = names.indexOf(login)) !== -1){
        if(password[i] === pass)
            console.log("Logged!");
    }
}

log("hans", "1234")

Answer 3

In your case, you can also try something like this with findIndex :

 const usernames = ['heine', 'hans']; const passwords = ['12343', '1234']; function login(user, pass) { let userIdx = usernames.findIndex(x => x === user); // On a real application do not give any tip about which is // wrong, just return "invalid username or password" on both cases. if (userIdx < 0) return "Invalid username!"; if (pass !== passwords[userIdx]) return "Invalid password!"; return "Login OK!" } console.log(login("heine", "12343")); console.log(login("hans", "lala")); 

Answer 4

Problem here is name is window.name which is a string..

 var name = ['heine', 'hans']; console.log(window.name, typeof window.name) var xname = ['heine', 'hans']; console.log(window.xname, typeof window.xname) 

Change your variable to another word that is not reserved if you are in global scope.